Ear trumpet



.June 3, 1930. H. D. HINTERNESCH 1,761,666

. EAR TRUMPET Fiied May 17, 1929 2 Sheets-Sheet 1 g l J I/ d 28 I ?5 Inventor 7 /7. J). /V//?7a/v1 euci Attorney June 1930- H. D. HINTERNESCH 1,761,666

EAR TRUMPET Filed May 17, 1929 2 Sheets-Sheet 2 I By Patented June 3, 1930 UNITED STATES HERMAN D. HINTERNESCH, or BALTIMORE, MARY-LAND EAR TRUMPET I Application filed May 17, 1929, Serial No. 363,915.

The present invention relates to devices closed my invention as comprising-a substanfor aiding a persons hearing, commonly known as ear trumpets and comprises essentially a casing adapted to fit upon the ear of the person having intake and discharge ends and providing air passages within the casing between said intake and discharge ends for condensing the sound waves passing therethrough before the same enters the ear orifice.

The invention also embodies means, for placing the casing upon the ear with facility and for securely retaining the casing inposition thereon against accidental displacement.

One of the important objects of the invention is to provide a device of this character of a. simple and practical construction, which is neat and attractive in appearance, which serves to efiiciently amplify the air waves for discharge into the ear orifice of a person using the device, which is relatively inexpensive to manufacture and otherwise well adapted for the purpose for which the same is intended.

Other objects and advantages reside in the special construction, combination and arrangement of the various elements forming the invention as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming part hereof wherein like numerals refer to like parts throughout, and in which:

Figure 1 is a side elevational view showing the device in position upon a persons head,

Figure 2 is a longitudinal sectional view therethrough,

Figure 3 is a sectional view with the outer plate of the casing removed and showing the tapering centripetal air passage therein,

Figure 4 is a rear elevational view,

Figure 5 is a front elevational View illustrating the manner in which the air discharge nipple fits snugly within the ear orifice,

Figure 6 is a fragmentary perspective view of the centripetal air passage mounted within the casing, and

Figure 7 is a rear elevational view of the device in position for use.

Referring now to the drawings in detail, for the purpose of illustration I have distially flat casing 5, composed of inner and outer wall sections 6 and 7 respectively-with one end of the casing open and with its opposite end curved-as shown at 8.

- The parts comprising the casing may be constructed of any suitable material well known in the art and secured in assembled position in any convenient and desirable manner to facilitate its manufacture in quantities.

Within the casing is positioned an air chamber 9 of generally centripetal formation, as will be more clearly observed from an inspection of Figures 3 and 6 of the drawings, and which includes a convolute wall 10 having one end indicated at 11 spaced from the curved wall v8 of the casing and with its opposite end 12 eurled'inwardly and terminating at a discharge opening 13 formed in the inner wall 6.

The inner wall 6 serves to close one side of the air chamber and the opposite side of said'chamber, adjacent the outer wall 7, is provided with a tapered cover 14 inclining inwardly from the outer to the inner end of the convolute wall 10 and also inclined toward the center of the air chamber, as will be observed from an inspection of Figure 2 of the drawings.

The air chamber 9 opens toward one side of the casing, as indicated at 15 and extending outwardly from the center of said opening is a guide partition 16 which has its ends flared outwardly from said opening and terminating in spaced relation against the side wall of the casing.

The opposite edges of the partition 16 engage the inner side of the inner and outer sections 6 and 7 so as to close communication through that side of the casing provided with the partition. Consequently one section of the partition, indicated at 17 constitutes a guide for the air passage 18 formed between the rear curved wall 8 of the casing and the convolute wall of the air chamber for directing sound waves passing along said air passage to the opening 15 of the chamber 9.

Likewise .the other section of said partition, indicated at 19 will serve to guide the sound waves entering the casing, from its open end for directing the same also into the chamber the souno waves will be condensed opening 15 of the air chamber so that the before discharge from the casing to the tubusound waves from the oppositesides of the lar extension after which the sound waves casing will converge at the opening and will be further condensed by reason of the enter the air chamber without interference reduced opening 25 in the nipple before en from each other.- tering the orifice of the car.

At thesidesgfthe air ,charnber 9- nearest r Inthis manner the .souiid.\vaves will be the openlsideoftheicasirig positioned}:- greatlygamplified; t partition 20 having sides 20 and 2l div erg- I t is c-bvious that my invention is susceping inwardly from the month end of the tible to varicus changes and modifications ea i vand f mh'gkiflfiifiaiiiileiieo fipiirt in" constructionwithout departing from the merits A andBtherei W spirit of the invention or the scope of the Th id 21 and 22 f th titien eb appended claims, and I accordingly claim operate with the side walls of the casing to. all such forms of the device to which I am gradually reduce the width of the com are: nil lcd. m nt,.v.inw r ily pf, th open g d fth j g ,l-laving tl'ius described-myinyention what i g. 1 io 16111111188 ew 1 ='Dh inner. .end; ofuthe compartment :A

.1. -,An. car.- trumpet -.of the {class described merges into thegaiirpassage,l8;and the inner coinpl'isingfazcasing open at one end, said end f the compartment B. i f th r r casing-hayingcts and remote fromtheopenduced -by the partitiqn w 11. 1 9 d serves t ug curved, a centripetal airichanlber arej -eet;grip.murrents ent rih th m artranged with nthe'casing with one-end openment-didireetly into the' openin 1 5 fth ing lnto thei-zcasing and with one of tits air ohamberA-A) for movelnent-,through said Walls disposed in spaced relation from the chamber in gthe same 1ire( ;tio'n as. .-the air curved end of said casing to form an air m e t i th hamber from the paspassage communicating with the open end age: -It i11:.th b z that th sound ofthe chamber, a part tion arranged withwaveg ,31' gradually'uco npressed before ill the casing .f01 d l1l3iilg sound waves reach ir g zthe ai cha b a 7 from said air passage intozthe opening of h discharg port 13. isvreniovably 'sethe air chamber, said casing having a disnred to g, tubular exten io 23 f curved charge port formed therein and communicatformation having-a rubber nipple 24 fitt d mg. with thecenter of. said airchamber, a tqlits outer endandprovided with a red c d tubular extension attached to said discharge discharge opening 425. Th t b lar exte port and a rubber nipple carried at the end sion 23 is adjustably arranged .so; that th of said extension forisnugly fitting within nipple 24.- ina be properly positioned within the ear ,orifice, said nipple having a reduced the, orifice o the car 26 .inrasnug manner Opening a its discharge elldh so thatthe sound :waves nfteri. ent ri th 2. ,An car trumpet of the class described orifice cannot escape around the sides of the 9 p ng a casing open at one end, aid casnipple. mg having its end remote from the opening To the outer-surface f th i n easing curved, a centripetal air chamber arranged section 6 is secured a pair f st l 27 within the casing with one end onening into der which it se tio f a b t wi 28 i i the casing and with one of its'wa s disposed serted having its ends extending toward on in spaced relation from the curved end of side f the casing with one f id d said casing to form an air ,assage commucurved a shown at 29 for ext di over d nicating with the open end of the air chambehind the ea 26 whereby to secure th her, a partition arranged within the casing i i iti th a for directing sound waves from-said air pas- V The other end of the wire is formed into g into the p ning of the air chamber, a hook 30 adapted to engage the templev bar Said g having a discharge 1301i formed f pair f y glas whi h may b worn therein and comma. ie ng with the center b th pet-Son, t f th i t i t i i g of said 2ll1 chai'nber, a tubular extension the casing in position upon the ear. curvedlongitudinally with one end attached If desired a head band 31 may al o b to said discharge opening and adapted for played and constructed of a substantially rotary ad] ustment with respect thereto and a thin flat strip adapted tobe inserted under rubber nipple attached to the outer end of the staples 2T infriction gripping rel ti said extension having a restricted opening with the outer surface of the casing and in at its discharge nd this manner the casing will be held against 3. un ear trumpet comprising a casing displacement upon theear. t will be obvious from the foregoing that curved, a centripetal air chamber arranged the sound waves entering the open end of the within the casing having one end opening into casing will be directed into the air chamber the casing and with its wall adjacent said by means of the partition 16 and by reason pen end disposed in spaced relation with f of the centripetal construction of the air the curved end of the casing whereby to form open at one end and having its opposite end i an air passagetherebetween, said air chamber having one of its sides tapering toward its center, guide means within the casing for directing sound waves from opposite sides of the air chamber into the open end thereof in a uniform direction, a discharge opening formed in the casing and communicating with the center of said air chamber and a reduced nipple connected to said discharge port adapted for snugly fitting within the ear orifice.

4. in ear trumpet comprising a casing open at one end and having its opposite end curved, guide means arranged within the casing adjacent its open end and including a pair of diverging sections cooperating with the walls of the casing to provide individual air compartment-s therein, a centripetal air chamber arranged within the casing at the inner ends of said guide means, said air chamber having one end opening into the casing, said air chamber including a conrolnte wall disposed in spaced relation from the curved end of the casing and also including a wall at right angles to said con volute wall and tapering toward the center of said air chamber, a partition disposed adjacent the open end of said air chamberfor directing sound waves from said air compartments into the air chamber for travelling thercthrough in a uniform direction, said casing having a discharge opening therein, a nipple adjustably connected to said opening to snugly fit within the orifice of the ear and means carried by the casing for attaching the same to the ear.

5. An ear trumpet comprising a casing having a month end, a plurality of air compartments formed within the casing, each having ccn'in'iunication with said mouth end and tapering inwardly from the mouth end, a tapering centripetal air passage communieating at its larger end with the reduced portious of said compartment and a discharge port for said air passage.

6. A n ear trumpet comprising a casing having a month end, a plurality of air compartments formed within the casing, each having communication with said mouth end and tapering inwardly from the month end, a tapering centripetal air passage communicating at its larger end with the reduced portions of said compartment, a discharge port for said air passage and a nipple revolubly "achei'l to said discharge port and adapted 2mfitting in an ear orifice.

T. An ear trumpet comprising a casing having a mouth end, a plurality of air compartments formed within the casing, each having communication with said mouth end and i g inwardly from the month end, a

centripetal air passage communiits larger end with the reduced portions of said compartment, a discharge port for said air passage and a nipple revolutaper J- mung at blyattached to said discharge port and adapted for'fittin Ein-tan ear orifice, said nipple having a fi'estricted discharge opening. I 8, Amearz trumpet comprising-2a casing having a mouth end, a plurality of air'compartmentsp formedwithin the casing, each havingmommunication with saidmoutlr Tend aimlatapering inwardly from: thelmouthrend, adzape'ringcentripetal .aii' passagecommimi eating at :dtsw darger': end with '=the;reduoed portions-cf- ,-said- -coi'npartment, a discharge port for said air passage, a nipple revolubly attached to-said discharge port and provided. withfa'restricted-discharge opening anda flexible beading formed on the sides of the nipple in'wardlyofthe discharge opening to :provide an'mirtight seal with the Walls of the-ear orifice :within which the'nipple is inserted. I 9. An ear' trumpet compri'singa casing having agm'outh end, a plurality of-rair com-4 partments formed within the casing, each having communication with said. month end and tapering inwardly fromlthelmouth end,

a tapering-centripetal air passage comm-u-; nicating at'its larger end with the reduced portions of said compartment, a discharge port oz-said air passage, a nipple revolubly attached to said discharge port and provided with a restricted discharge opening-a flexible beading formed .-on the sides of the nip--v ple inwardly of-the discharge opening to provide an air tightseal withthe walls of the ear orifice within which the nipple. is inserted and means for attaching the casing to the ear comprising a wire hanger having one end bent for fixing over'and behind the lobe-of the car and with an intermediate portion of the wire formed with a return bend to provide a pair of parallel sections and staples carried by the casing for receiving said sections of the wire and retaining the same in spring pressed engagement.

10. An ear trumpet comprising a casing having. a month end, a plurality of air compartments formed within the casing, each having communication with said mouth end and tapering inwardly from the mouth end, a tapering centripetal air passage communicating at its larger end with the reduced portions of said compartment, a dischar e port for said air passage, a nipple revoluiily attached to said discharge port and provided with a restricted discharge opening, a flexible bearing formed on the sides of the nipple inwardly of the discharge openin to provide an air tight seal with the walls 0? the ear orifice within which the nipple is inserted and means for attaching the casing to the ear comprising a wire hanger having one end bent for fitting over and behind the lobe of the ear and with an intermediate portion of the wire formed with a return bend to provide a pair of parallel sections, staples carried by the casing for receiving said sections of the wire and receiving the same in spring pressed engagement and a hook formed on the opposite end-ofthe wire for detachably securing the wire to the temple bar of a pair of eye 5 glasses. s r

' 11. An ear trumpet comprising a casing having a mouth end, a-plurality of air compartments formed within the casing, each having communication with said mouth end and tapering inwardly from the mouth end,

a tapering centripetal air passage communieating-at its larger end with the reduced portions of said compartment, a'discharge port for said air passage, a nipple revolubly attached to said discharge port and provided with a restricted discharge opening, a flexible bearingforming on the sides of the nipple inwardly of the discharge opening to provide an air tight seal with the walls of the ear oriao fice Within which the nipple is inserted, and

means forinterchangeably attaching the easing to either ear comprising a wire hanger having one end bent for fitting over and behind the lobe of the ear and with an intermediate portion of the wire formed with a return bend to provide a pair of parallel sections, staples carried by the casing for receiving said sections of the wire and retaining the same in spring pressed engagement in and a hook formed on the opposite end of the wirefor detaehably securing the wire to the temple bar of a pair of eyeglasses.

12. An eartrumpet comprising a casing having a mouth end, a plurality of air compartments formed within the casing, each having communication with said mouth end and tapering inwardly from the mouth end, a tapering centripetal air passage communicating at its larger end with the reduced portions of said compartment, a discharge port for said air passage, a nipple revolubly attached to said discharge port and provided with a restricted discharge opening, a flexible bearing forming on the sides of the nipple inwardly of the discharge opening to provide an air tight seal with the walls of the ear orifice within which the nipple is inserted, and means for interchangeably attaching the easing to either ear comprising a Wire hanger re having one end bent for fitting over and behind the lobe of the ear and with an intermediate portion of the wire formed with a return bend to provide a pair of parallel sections, staples carried by the casing for receiving said sections of the wire and retaining the same in spring pressed engagement, a hook formed on the opposite end of the wire for detachably securing the wire to the temple bar of a pair of eye glasses and a head band 69 having one end relnovably inserted under said staple between the parallel sections of the wire and with its opposite end adapted to ex-. tend across the top of the head of the wearer. In testimony whereof I afiix my signature. M HERMAN D. HINTERNESCH. 

